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Architectural Panel Solutions Ltd
5 Wainwright Close
Churchfields Industrial Estate St Leonards-on-Sea
East Sussex TN38 9PP
Tel: 01424 852641 Fax: 01424 852797
Agrément Certificate
e-mail: [email protected]
20/5792
website: www.architecturalpanelsolutions.com Product Sheet 1
DOWNER CLADDING SUPPORT SYSTEMS
DOWNER RAINSCREEN CLADDING SUPPORT SYSTEMS
This Agrément Certificate Product Sheet(1) relates to
Downer Rainscreen Cladding Support Systems, for use as a sub-frame to support cladding on the external or internal walls in structures of new or existing buildings.
(1) Hereinafter referred to as ‘Certificate’.
CERTIFICATION INCLUDES:
• factors relating to compliance with Building Regulations where applicable
• factors relating to additional non-regulatory information where applicable
• independently verified technical specification • assessment criteria and technical investigations • design considerations
• installation guidance
• regular surveillance of production • formal three-yearly review. KEY FACTORS ASSESSED
Mechanical resistance and stability — the systems can be designed to support the cladding and to transfer the design loads to the substrate wall structure safely (see section 6).
Behaviour in relation to fire — the systems (fixings, brackets and carrier rails) have an A1 reaction to fire classification in accordance with BS EN 13501-1 : 2018 (see section 7).
Durability — under normal service conditions, the systems will have a service life in excess of 35 years (see section 10).
The BBA has awarded this Certificate to the company named above for the systems described herein. These systems have been assessed by the BBA as being fit for their intended use provided they are installed, used and maintained as set out in this Certificate.
On behalf of the British Board of Agrément
Date of First issue: 13 August 2020 Hardy Giesler
Chief Executive Officer The BBA is a UKAS accredited certification body – Number 113.
The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at www.bbacerts.co.uk
Readers MUST check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA directly.
Any photographs are for illustrative purposes only, do not constitute advice and should not be relied upon.
British Board of Agrément
Bucknalls Lane Watford Herts WD25 9BA ©2020 tel: 01923 665300 [email protected] www.bbacerts.co.uk
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Regulations
In the opinion of the BBA, Downer Rainscreen Cladding Support Systems, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to satisfying the relevant requirements of the following Building Regulations (the presence of a UK map indicates that the subject is related to the Building Regulations in the region or regions of the UK depicted):
The Building Regulations 2010 (England and Wales) (as amended)
Requirement: A1 LoadingComment: The systems can be designed to adequately transfer the design loads from the cladding to the substrate wall structure. See sections 6.2 to 6.6 and 6.8 to 6.13 of this Certificate. Requirement: B4(1) External fire spread
Comment: The systems may be unrestricted by this Requirement. See sections 7.1 and 7.2 of this Certificate.
Regulation: 7(1) Materials and workmanship Comment:
Regulation: Comment:
7(2)
The systems are acceptable. See section 10 and the Installation part of this Certificate. Materials and workmanship
The systems are unrestricted by this Regulation. See section 7.1 of this Certificate.
The Building (Scotland) Regulations 2004 (as amended)
Regulation: 8(1) Durability, workmanship and fitness of materials
Comment: The systems are acceptable. See section 10 and the Installation part of this Certificate. Regulation: 9 Building standards applicable to construction
Standard: 1.1(a)(b) Structure
Comment: The systems can be designed to adequately transfer the design loads from the cladding to the substrate wall structure, with reference to clause 1.1.1(1)(2) of this Standard. See
sections 6.2 to 6.6 and 6.8 to 6.13 of this Certificate. Standard: 2.6 Spread to neighbouring buildings
Comment: The systems can contribute to satisfying this Standard, with reference to clauses 2.6.4(1)(2)
, 2.6.5
(1) and 2.6.6(2). See sections 7.1 and 7.2 of this Certificate.Standard: 2.7 Spread on external walls
Comment: The systems can contribute to satisfying this Standard, with reference to clause 2.7.1(1)(2).
See section 7.1 of this Certificate. Standard: 7.1(a) Statement of sustainability
Comment: The systems can contribute to meeting the relevant Requirements of Regulation 9, Standards 1 to 6, and therefore will contribute to a construction meeting a bronze level of sustainability as defined in this Standard.
(1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic).
The Building Regulations (Northern Ireland) 2012 (as amended)
Regulation: 23 Fitness of materials and workmanshipPage 3 of 18 Regulation: 30 Stability
Comment: The systems can be designed to adequately transfer the design loads from the cladding to the substrate wall structure. See sections 6.2 to 6.6 and 6.8 to 6.13 of this Certificate. Regulation: 36(a) External fire spread
Comment: The systems may be unrestricted by this Regulation. See sections 7.1 and 7.2 of this Certificate.
Construction (Design and Management) Regulations 2015
Construction (Design and Management) Regulations (Northern Ireland) 2016
Information in this Certificate may assist the client, designer (including Principal Designer) and contractor (including Principal Contractor) to address their obligations under these Regulations.
See section: 3 Delivery and site handling (3.4 and 3.6) of this Certificate.
Additional Information
NHBC Standards 2020
In the opinion of the BBA, Downer Rainscreen Cladding Support Systems, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to satisfying the relevant requirements in relation to NHBC
Standards, Part 6 Superstructure (excluding roofs), Chapter 6.9 Curtain walling and cladding (see section 1.1 of this
Certificate).
Technical
Specification
1 Description
1.1 Downer Rainscreen Cladding Support Systems are attached to the external or internal walls of structures(1), for new
or existing buildings (see Figures 1 and 2) and consist of the following four types:
• Downer DCS 021 (Omega and ZED) System — an aluminium framing system (see Figure 1a) comprising Omega and Zed rails fixed directly to the substrate with a minimum cavity width of 25 mm(2). The rails are made of aluminium
grade EN AW 6005A T6 to BS EN 573-3 : 2019 and range as specified in Table 1 of this Certificate. The rails can be installed in a single layer or a combination of both vertical and horizontal rails in the same installation
• Downer DCS 031 (HELPING HAND(3)) System — an aluminium framing system comprising L and T carrier
rails/timber batten holders and wall brackets (see Figure 1b). They are installed in vertical alignments and provide cavity widths ranging from 49 to 442 mm. The single and double wall brackets (including double Helping Hand brackets and folded double Helping Hand brackets), carrier rails and timber batten holders are made of aluminium with a minimum grade of EN AW 6063 T6 to BS EN 573-3 : 2019, except for 310F to 400F double brackets and timber batten holders which are manufactured from aluminium alloy to a minimum grade of EN AW 5251/H22 to BS EN 573-3 : 2019, and the thickness and profile dimensions specified in Tables 2 to 7 of this Certificate. Thermal Isolation Pads are Foamalux FES PVC foam sheets
• Downer DCS 041 (Floor-to-floor Spanning) System — an adjustable support system to form cavity widths ranging from 86 to 223 mm. Comprising wall brackets and carrier rails as shown in Figure 1c. The components are manufactured from aluminium grade EN AW 6005A T6 to BS EN 573-3 : 2019 and thermal isolation pads are manufactured from Foamalux FES PVC foam sheets, and are specified in Table 10
• Downer DCS 004 (Mechanical Secret Fix) System — where specifications dictate a clear facade unobstructed by visible fixings, the DCS 004 (Mechanical Secret Fix) System is used (see Figure 1d). Panel hangers fixed to the rear face of the panels hook on to horizontal cladding rails, which in turn are fixed to one of the vertical carrier rail systems DCS 021, 031 or 041. The components of the Downer DCS 004 (Mechanical Secret Fix) System are made of aluminium grade EN AW 6005A T6 to BS EN 573-3 : 2019 and are summarised in Table 11 of this Certificate. The fixings used to attach the horizontal rails to the vertical rails are 5.5 x 25 mm low profile stainless steel self-drilling, self-tapping tek screws.
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(1) For walls in timber frame and steel frame structures, the rails must always be positioned on the sheathing board such that they align with the structural frame behind.
(2) The minimum cavity width must comply with the requirements in NHBC Standards 2020, Chapter 6.9, based on the type of cladding joint type. When DCS021 is used in isolation and not as a component part of the other systems, it won’t be compliant with NHBC Standards 2020, Chapter 6.9.
(3) HELPING HAND is a registered trademark.
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Figure 2 Components details
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Figure 2 Components details
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Figure 2 Components details
Table 1 Downer DCS 021 System — carrier rail specifications (thickness 2 mm)
Component Code Cavity width (mm) Dimensions (mm) Length (mm) Omega Carrier Rail Mill Finish OM25-3 25 45 x 25 x 34 x 25 x 45 3000 OM25-6 25 45 x 25 x 34 x 25 x 45 6000 OM40-3 40 45 x 40 x 34 x 40 x 45 3000 OM40-6 40 45 x 40 x 34 x 40 x 45 6000 Zed Carrier Rail Mill Finish ZED25-3 25 40 x 25 x 40 3000 ZED25-6 25 40 x 25 x 40 6000 ZED40-3 40 40 x 40 x 40 3000 ZED40-6 40 40 x 40 x 40 6000
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Table 2 Downer DCS 031 System — single wall bracket product range (thickness 3 mm)
Component Code Size ‘P’(1)
(mm) Range ‘R’(2) (mm) Design resistance (kN) Vertical (shear) Horizontal (axial) Single Helping Hand Bracket (Height: 88 mm) HH-Single40 40 49-59(3) 1.44 1.56 HH-Single45 45 54-64(3) 1.28 1.56 HH-Single50 50 59-69(3) 1.15 1.56 HH-Single60 60 69-79(3) 0.96 1.56 HH-Single70 70 72-90(3) 84-109(4) 0.82 1.56 HH-Single100 100 102-142(4) 0.58 1.56 HH-Single130 130 132-172(4) 0.44 1.56 HH-Single160 160 162-202(4) 0.36 1.56 HH-Single190 190 192-232(4) 0.30 1.56 HH-Single220 220 222-262(4) 0.26 1.56 HH-Single250 250 252-292(4) 0.23 1.56 HH-Single280 280 282-322(4) 0.21 1.38
(1) Size ‘P’ is the length of the flange standing out perpendicular to the substrate. (2) Range ‘R’ is the cavity depth to be provided by the bracket and the rail. (3) 40 mm rail leg Inserted.
(4) 60 mm rail leg Inserted.
Table 3 Downer DCS 031 System — double wall bracket product range (thickness 3 mm)
Component Code Size
‘P’(1) (mm) Range ‘R’(2) (mm) Design resistance (kN) Vertical (shear) Horizontal (axial) Double Helping Hand Bracket (Height: 150 mm) HH-Double70 70 72-90(3) 84-109(4) 2.69 2.65 HH-Double100 100 102-142(4) 1.89 2.65 HH-Double130 130 132-172(4) 1.45 2.65 HH-Double160 160 162-202(4) 1.18 2.65 HH-Double190 190 192-232(4) 0.99 2.65 HH-Double220 220 222-262(4) 0.86 2.65 HH-Double250 250 252-292(4) 0.75 2.65 HH-Double280 280 282-322(4) 0.67 2.31 HH-Double310(5) 310 312-352(4) 0.49 2.16 HH-Double340(5) 340 342-382(4) 0.45 2.16 HH-Double370(5) 370 372-412(4) 0.41 2.16 HH-Double400(5) 400 402-442(4) 0.38 2.16
(1) Size ‘P’ is the length of the flange standing out perpendicular to the substrate. (2) Range ‘R’ is the cavity depth to be provided by the bracket and the rail. (3) 40 mm rail leg Inserted.
(4) 60 mm rail leg Inserted.
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Table 4 Downer DCS 031 System — carrier rail specifications (thickness 2 mm)
Component Code size
(mm) Length (mm) Tee Carrier Rail Mill Finish T100/60-3 100 x 60 3000 T100/60-6 100 x 60 6000 T125/60-3 125 x 60 3000 T125/60-6 125 x 60 6000 T125/40-3 125 x 40 3000 T125/40-6 125 x 40 6000 T140/60-3 140 x 60 3000 T140/60-6 140 x 60 6000 L Rail Mill Finish L60/40-3 60 x 40 3000 L60/40-6 60 x 40 6000
Table 5 Downer DCS 031 System — timber batten holder specifications (thickness 2 mm)
Component Code size(1)
(mm) Length (mm) Timber Batten Holder Mill Finish TBH38/100 35 x 100(1) 160 TBH38/50 35 x 50(1) 160
(1) Timber batten holder sizes 35 x 100 mm and 35 x 50 mm are suitable for timber sizes 38 x 100 mm and 38 x 50 mm, respectively.
Table 6 Downer DCS 031 System — thermal isolation pads specifications (thickness 5 mm)
Component Code Suitable for Height
(mm) Thermal
Isolation Pads
ISO/Single Single HELPING HAND Wall Bracket 88 ISO/Double Double HELPING HAND Wall Bracket 150
Table 7 Downer DCS 031 System — fixing specifications
Component Code used for
Frame screw FDS4819 4.8 x 19 mm stainless steel for fixing rail to helping hand bracket Frame screw(1) FDS35550W16 5.5 x 50 mm stainless steel for fixing helping hand bracket to substrate
wall’s steel studs with up to 3 mm thickness
Wall Anchor Set(1) WAKB10060A4 10 x 60 mm stainless steel for fixing helping hand bracket to dense
masonry wall
Wall Anchor Set(1) WAKB10070A4 10 x 70 mm stainless steel for fixing helping hand bracket to dense
masonry wall
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Table 8 Downer DCS 041 — Wall brackets (Thicknesses 3 or 4 mm)
Description Code Size ‘P’(1)
(mm) Design resistance (kN) Vertical (shear) Horizontal (axial) Fixed Point Wall Bracket
Single (centre) anchor fixing to concrete floor slab
DCS 04 BA083 / 100 83 1.35 4.16
DCS 04 BA118 / 100 118 0.81 4.16
Fixed Point Wall Bracket Double (side) anchor fixing to concrete floor slab
DCS 04 BA088 / 120 88 2.025 6.34 DCS 04 BA123 / 120 123 1.296 6.34 DCS 04 BA153 / 120 153 0.972 6.34
Sliding Point Wall Bracket Single (centre) anchor fixing to concrete floor slab
DCS 04 BB083 / 100 83 — 4.16
DCS 04 BB118 / 100 118 — 4.16
Sliding Point Wall Bracket Double (side) anchor fixing to concrete floor slab
DCS 04 BB088 / 120 88 — 6.34
DCS 04 BB123 / 120 123 — 6.34
DCS 04 BB153 / 120 120 — 6.34
(1) Size ‘P’ is the length of projection standing out perpendicular to the substrate.
Table 9 Downer DCS 041 System — carrier rail specifications (thicknesses of the flanges and web are 3 and 2.5 mm, respectively)
Component Code size
(mm)
Length (mm) T-Box Carrier Rail Mill
Finish (untreated)
DCS 041 RT075 / 4 / 6000 125x75 6000 DCS 041 RT100 / 4 / 6000 125x100 6000 Box Carrier Rail
Mill Finish (untreated)
DCS 041 RB075 / 4 / 6000 46x75 3000 DCS 041 RB100 / 4 / 6000 46x100 6000
Table 10 Downer DCS 041 System — thermal isolation pads specifications (thickness 5 mm)
Component Code Suitable for
Thermal Isolation Pads
DCS 04 BS100 single anchor wall bracket type DCS 04 BS120 double anchor wall bracket type
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Table 11 Downer DCS 004 — Carrier rail, hangers and fixing specifications
Component Code Size
Horizontal Carrier Rail Mill Finish
DCS004Rail-3 Length = 3000 mm
DCS004Rail-6 Length = 6000 mm
Adjustable Hanger DCS004HAKE50 Square hole 10.2 mm
DCS004HAK50 Hex hole 9.2 mm
DCS004HA50A 2x7 mm diameter holes
Fixed Hanger DCS004HFKE50 Square hole 10.2 mm
DCS004HFK50 Hex hole 9.2 mm - for Keil
DCS004HF50A 2x7 mm diameter holes
Standard Hanger DCS004HSKE50 Square Hole
DCS004HSK50 Hex Hole 9.2mm - for Keil
DCS004HS50A 2x7 mm diameter holes
1.2 Components specified for use with the systems, recommended by the Certificate holder but outside the scope of this Certificate, include:
• fastening screws — self-drilling and self-tapping screws made of austenitic stainless steel grade A2 or higher strength grades with a washer made of aluminium or stainless steel with vulcanised EPDM sealant, used as primary fixing of wall brackets to steel frame substrate walls
• cavity barriers
• frame screw, wall anchor set, rail connecting spigot, stainless steel rail bolt set and spigot retaining screws • insulation within the cavity
• Cladding panels.
2 Manufacture
2.1 The metal profiles including rails, brackets and hangers are manufactured from extruded sections of aluminium alloy.
2.2 As part of the assessment and ongoing surveillance of product quality, the BBA has:
• agreed with the manufacturer the quality control procedures and product testing to be undertaken • assessed and agreed the quality control operated over batches of incoming materials
• monitored the production process and verified that it is in accordance with the documented process • evaluated the process for management of nonconformities
• checked that equipment has been properly tested and calibrated
• undertaken to carry out the above measures on a regular basis through a surveillance process, to verify that the specifications and quality control operated by the manufacturer are being maintained.
2.3 The management systems of the manufacturer have been assessed and registered as meeting the requirements of BS EN ISO 9001 : 2015 by LRQ (Coventry) (Certificate LRQ 10103962).
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3 Delivery and site handling
3.1 The aluminium rails are wrapped on pallets.
3.2 Packs of rails should be stacked horizontally, on sufficient bearers to prevent distortion, to a maximum height of one metre.
3.3 The pallets should be stored on a dry, flat and level surface, suitably protected from the weather. 3.4 The brackets are delivered to site in cartons suitable for manual handling.
3.5 The systems should be handled with care. Damaged items should be discarded.
3.6 Protective clothing should be worn, as required, and all Health and Safety regulations observed. Care should be taken when handling long lengths of rail, especially at height.
Assessment and Technical Investigations
The following is a summary of the assessment and technical investigations carried out on Downer Rainscreen Cladding Support Systems.
Design Considerations
4 Use
4.1 Downer Rainscreen Cladding Support Systems, when installed in accordance with this Certificate, are satisfactory for use in back-ventilated and drained cavity rainscreen cladding systems, as well as for internal lining systems, as a sub-frame to support cladding on the external or internal wall structure, of new and existing buildings.
4.2 The substrate wall to which the systems are to be fixed must be structurally sound, watertight. It is important for designers, planners, contractors and/or installers to ensure that the systems and the substrate wall have adequate structural capacity to support cladding panels in accordance with the design and installation requirements of the cladding panel supplier.
5 Practicability of installation
The systems are designed to be installed by cladding contractors who are experienced in such installations. Further advice can be provided by the Certificate holder.
6 Mechanical resistance and stability
6.1 The substrate wall to which the cladding components are to be fixed should be designed and constructed in accordance with the requirements of the relevant national Building Regulations and Standards.
6.2 Assessment of structural performance of the systems for individual buildings must be carried out by a designer or a suitably qualified and experienced individual to ensure that:
• the support systems and cladding to be supported are compatible
• any thermal expansion effects of both the support systems and the cladding to be supported are taken into account in the design and detailing.
• the specified fixings have adequate tensile and pull-out strength to resist the applied actions
• the fixing of the support brackets to the supporting wall has adequate tensile, shear and pull-out strength, and corrosion resistance (outside the scope of this Certificate). An appropriate number of site-specific pull-out tests must be conducted on the substrate wall to determine the minimum pull-out resistance to failure of the fixings.
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The characteristic pull-out resistance should be determined in accordance with the guidance given in EOTA TR055 : 2016, using 50% of the mean value of the five smallest measured values at the ultimate load.
6.3 The supporting wall must be able to resist the gravity load from the self-weight of the cladding, the wind actions and any racking loads, on its own. No contribution from the cladding system may be assumed in this respect. 6.4 The wind actions on the wall should be calculated by a suitably competent and experienced individual in accordance with BS EN 1991-1-4 : 2005 and its UK National Annex. Due consideration should be given to the high-pressure coefficients applicable to corners of the building as recommended in this Standard. In accordance with BS EN 1990 : 2002 and its UK National Annex, it is recommended that a partial load factor of 1.5 is used to determine the ultimate wind load to be resisted by the systems.
6.5 A combination of horizontal and vertical actions must be checked by an appropriately competent and
experienced individual , in accordance with BS EN 1999-1-1 : 2007 and BS EN 1999-1-3 : 2007, and their UK National Annexes, in conjunction with BS EN 1990 : 2002 and its corresponding UK National Annex.
6.6 Details of the brackets and carrier rails, with their design resistances, are shown in Tables 1 to 11. The design resistances of the connections should be greater than that of the brackets as tabulated.
6.7 For details of the fixings’ suppliers, the advice of the Certificate holder should be sought.
6.8 The design of the rails and associated connections must satisfy the requirements of BS EN 1999-1-1 : 2007, using the mechanical properties of the aluminium grade adopted. Mid-span deflections should be limited to span/200 and cantilever deflections limited to span/150.
6.9 The geometric properties of the rail sections can be found in detail in Table 12, and used by the structural designer for the rail design.
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6.10 For standard three-metre long rails, a gap of 10 mm between adjacent rails should be incorporated to allow for expansion. For other rail lengths the gap should be proportionally increased. For calculation purposes, the coefficient of thermal expansion for aluminium may be taken as 23 x 10–6·K–1. Existing movement joints in the supporting
structure should be maintained through the rail system.
6.11 The design and the installation must be checked by a suitably competent and experienced individual. 6.12 Any insulation behind the cladding must be suitably fixed to the supporting wall and protected, to resist the forces of wind suction. Insulation should be, at least, of the semi-rigid type (eg boards or batts).
Impact loading
6.13 The impact resistance of a cladding system is a function of the support framing arrangement and the cladding panel used. The design engineer should ensure that the cladding system incorporating the Downer Rainscreen Cladding Support Systems has adequate impact resistance for the support frame arrangement and cladding panels used, for the intended Use category as defined in EAD 090062-00-0404 : 2018, Table G.2.
7 Behaviour in relation to fire
7.1 The aluminium brackets, rails and associated rail-to-bracket fixings are non-combustible and, therefore, are classified as Class A1 in accordance with the national Building Regulations and are not subject to any restriction on building height or proximity to boundaries (see Section 7.2).
Table 12 Rail section details
Code dimension (X) (mm) dimension (Y) (mm) thickness (mm) area (mm2)
Second moment of area
Radius of gyration Distance to centre of gravity Iyy (mm4) Izz (mm4) Axis yy (mm) Axis zz (mm) C (mm) y z Omega 45 x 25 x 34 x 25 x 45 OM25-3/6 45.0 25.0 2 314 28200 307100 9.48 31.27 62.00 8.40 45 x 40 x 34 x 40 x 45 OM40-3/6 45.0 40.0 2 374 86500 322500 15.21 29.36 62.00 14.30 Zed 40 x 25 x 40 ZED25-3/6 40.0 25.0 2 193 21500 79100 10.55 20.24 39.00 12.50 Zed 40 x 40 x 40 ZED40-3/6 40.0 40.0 2 223 62300 79100 16.71 18.83 39.00 20.00 T Rail 100 x 60 T100/60-3/6 100.0 60.0 2 318 98800 166700 17.63 22.90 50.00 47.96 T Rail 125 x 60 T125/60-3/6 125.0 60.0 2 368 104000 325500 16.81 29.74 62.50 49.52 T Rail 125 x 40 T125/40-3/6 125.0 40.0 2 328 32500 325500 9.95 31.50 62.60 34.21 T Rail 140 x 60 T140/60-3/6 140.0 60.0 2 398 106500 457300 16.36 33.90 70.00 50.24 L Rail 40 x 60 L40/60-3/6 40.0 60.0 2 196 75100 27700 19.57 11.89 8.88 41.26 L Rail 60 x 40 L60/40-3/6 60.0 40.0 2 196 27700 75100 11.89 19.57 18.74 31.12 T Box 125 x 75 DCS041 RT075/4/ 6000 125.0 75.0 2.5/3 919 742000 759000 28.41 28.74 62.50 47.56 T Box 125 x 100 DCS041 RT100/4/ 6000 125.0 100.0 2.5/3 1041 1476000 819000 37.65 28.05 62.50 61.24 Box 46 x 75 DCS041 RB075/4/ 6000 46.0 75.0 2.5/3 662 506600 229300 27.66 18.61 23.00 37.50 Box 46 x 100 DCS041 RB100/4/ 6000 46.0 100.0 2.5/3 787 1016000 289000 35.93 19.16 23.00 50.00 DCS004 Rail DCS004 RAIL/3/6 23.5 62.5 3 324 159800 21600 22.21 8.16 14.98 8.50
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7.2 Where timber battens are used, the use of the system is restricted to buildings with no storey 18 m or more in height (11 m in Scotland). In addition, in Scotland such constructions may not be used 1m or less from a boundary. 7.3 Designers should refer to the relevant national Building Regulations and guidance for detailed conditions of use, particularly in respect of requirements for substrate fire performance, cavity barriers and combustibility limitations for other materials and components used in the overall wall construction (for example, structural framework, thermal insulation and cladding).
8 Drainage and ventilation
8.1 The systems, when incorporated in back-ventilated and drained cavity rainscreen cladding systems, will not have an adverse effect on the removal of water from the cavity by drainage and ventilation.
8.2 For the effective removal of moisture from the cavity, a minimum ventilation area of 500 mm2 per metre run of
cladding must be provided at the building base point and at the roof edge. To prevent the ingress of birds, vermin, insects and/or rain, all ventilation openings should be suitably protected with a ventilation protection mesh, perforated sheet or similar, or should be baffled.
8.3 The air space between the back of the cladding panels and the supporting wall (or insulation where installed within the cavity) should meet the minimum specifications in NHBC Standards 2020, Chapter 6.9.
8.4 The ventilation pathways behind the cladding must not be allowed to become blocked, or the insulation dislodged, where it may be vulnerable to wetting.
9 Maintenance
The systems are confined behind the cladding panels and do not require special maintenance.
10 Durability
Under normal service conditions, the systems, when used as prescribed in this Certificate, will have a service life in excess of 35 years.
11 Reuse and recyclability
The systems components contain PVC and aluminium, which can be recycled.
Installation
12 General
12.1 The systems must be installed in accordance with the Certificate holder’s recommendations, the requirements of this Certificate and any specifications laid down by the project designer.
12.2 The Certificate holder can provide technical assistance at the design stage, and installation assistance at the start of the installation.
13 Procedure
13.1 A grid layout for the sub-frame is first prepared.
13.2 Where required to protect the substrate wall from wind-driven rain, an appropriate vapour permeable membrane should be applied to the surface.
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13.3 The Omega or Zed rails or brackets (with the isolation pad) are fixed to the substrate wall using stainless steel fixings (see section 6.2).
13.4 The rails are inserted into the brackets, adjusted for line and level and fixed to the brackets using self-drilling stainless steel screws.
13.5 Where specified, insulation should be tightly butted around the brackets and secured to the substrate wall using appropriate fixings.
13.6 Cladding panels (outside the scope of this Certificate) deemed to be compatible with the systems are appropriately fixed to the vertical rails.
Technical Investigations
14 Investigations
14.1 The manufacturing process was evaluated, including the methods adopted for quality control, and details were obtained of the quality and composition of the materials used.
14.2 An assessment was made of the systems’ resistance to wind loading based on calculations to BS EN 1999-1-3 : 2007, durability and behaviour in relation to fire.
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Bibliography
BS EN 573-3 : 2019 Aluminium and aluminium alloys — Chemical composition and form of wrought products — Part 3:
Chemical composition and form of products
BS EN 1990 : 2002 + A1 : 2005 Eurocode — Basis of structural design
NA to BS EN 1990 : 2002 + A1 : 2005 UK National Annex for Eurocode — Basis of structural design BS EN 1991-1-4 : 2005 + A1 : 2010 Eurocode 1 — Actions on structures — General actions — Wind actions
NA to BS EN 1991-1-4 : 2005 + A1 : 2010 UK National Annex to Eurocode 1 — Actions on structures — General actions —
Wind actions
BS EN 1999-1-1 : 2007 + A2 : 2013 Eurocode 9 Design of aluminium structures — General structural rules
NA to BS EN 1999-1-1 : 2007 + A1 : 2009 UK National Annex to Eurocode 9 — Design of aluminium structures — General
structural rules
BS EN 1999-1-3 : 2007 + A1 : 2011 Eurocode 9 — Design of aluminium structures — Structures susceptible to fatigue NA to BS EN 1999-1-3 : 2007 + A1 : 2011 UK National Annex to Eurocode 9 — Design of aluminium structures —
Structures susceptible to fatigue
BS EN 13501-1: 2018 Fire classification of construction products and building elements — Classification using data from
reaction to fire tests
BS EN ISO 9001 : 2015 Quality management systems. Requirements
EAD 090062-00-0404 : 2018 – Kits for external wall claddings mechanically fixed
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Conditions of Certification
15 Conditions
15.1 This Certificate:• relates only to the product/system that is named and described on the front page
• is issued only to the company, firm, organisation or person named on the front page – no other company, firm, organisation or person may hold or claim that this Certificate has been issued to them
• is valid only within the UK
• has to be read, considered and used as a whole document – it may be misleading and will be incomplete to be selective
• is copyright of the BBA • is subject to English Law.
15.2 Publications, documents, specifications, legislation, regulations, standards and the like referenced in this Certificate are those that were current and/or deemed relevant by the BBA at the date of issue or reissue of this Certificate.
15.3 This Certificate will remain valid for an unlimited period provided that the product/system and its manufacture and/or fabrication, including all related and relevant parts and processes thereof:
• are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA • continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine • are reviewed by the BBA as and when it considers appropriate.
15.4 The BBA has used due skill, care and diligence in preparing this Certificate, but no warranty is provided. 15.5 In issuing this Certificate the BBA is not responsible and is excluded from any liability to any company, firm, organisation or person, for any matters arising directly or indirectly from:
• the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system
• the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system
• actual installations of the product/system, including their nature, design, methods, performance, workmanship and maintenance
• any works and constructions in which the product/system is installed, including their nature, design, methods, performance, workmanship and maintenance
• any loss or damage, including personal injury, howsoever caused by the product/system, including its manufacture, supply, installation, use, maintenance and removal
• any claims by the manufacturer relating to CE marking.
15.6 Any information relating to the manufacture, supply, installation, use, maintenance and removal of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used, maintained and removed. It does not purport in any way to restate the requirements of the Health and Safety at Work etc. Act 1974, or of any other statutory, common law or other duty which may exist at the date of issue or reissue of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care.
British Board of Agrément
Bucknalls Lane Watford Herts WD25 9BA ©2020 tel: 01923 665300 [email protected] www.bbacerts.co.uk
